My dad had fallen down and hurt his head.. The wound went kinda deep and turned into a hole... When we took him to the hospital we were told the wound needs to be cleaned and the tissues are spoilt and needs to be removed. Its been 2 weeks now the wound is fine bt now inorder to close the wound they have to drill the skul bone so that the tissues can grow and the wound can heal completely from inside ..hence another surgery is required.. I need advice on this... And need someone to explain me what exactly happens.